from i-10 in east texas. 100 cars smashed, nearly 100 people injured. and two dead, a husband and wife, their suv crushed by an 18-wheeler. >> it is like he was jumping around, he was in the air, air borne, taking these cars with him. >> reporter: police credit good samaritans with helping to save lives. kate is a nurse who rushed to help another family as the chain reaction continued. >> so i jumped in the car, got the little boy, closed the door, we braced each other. >> reporter: this man managed to free nine accident victims. >> you really couldn't see because of the fog, i started to help people out of the cars. >> reporter: the fog was described as a death trap. four years ago, a deadly mix of brush and smoke caused a pileup on i-4 in florida, killing four. in california, in 2007, dense fog caused this 100-car pileup near fresno that killed two.